;/**************************************************************************/
;/*                                                                        */
;/*       Copyright (c) Microsoft Corporation. All rights reserved.        */
;/*                                                                        */
;/*       This software is licensed under the Microsoft Software License   */
;/*       Terms for Microsoft Azure RTOS. Full text of the license can be  */
;/*       found in the LICENSE file at https://aka.ms/AzureRTOS_EULA       */
;/*       and in the root directory of this software.                      */
;/*                                                                        */
;/**************************************************************************/
;
;
;/**************************************************************************/ 
;/**************************************************************************/ 
;/**                                                                       */ 
;/** ThreadX Component                                                     */ 
;/**                                                                       */ 
;/**   Module Manager                                                      */ 
;/**                                                                       */ 
;/**************************************************************************/ 
;/**************************************************************************/ 
;
    IMPORT  _txm_module_manager_kernel_dispatch
    IMPORT  _tx_thread_current_ptr
;
    AREA ||.text||, CODE, READONLY, ALIGN=5
    THUMB
;/**************************************************************************/ 
;/*                                                                        */ 
;/*  FUNCTION                                               RELEASE        */ 
;/*                                                                        */ 
;/*    _txm_module_manager_user_mode_entry             Cortex-M3/MPU/AC5   */ 
;/*                                                           6.1          */
;/*  AUTHOR                                                                */
;/*                                                                        */
;/*    Scott Larson, Microsoft Corporation                                 */
;/*                                                                        */
;/*  DESCRIPTION                                                           */ 
;/*                                                                        */ 
;/*    This function allows modules to enter kernel mode.                  */ 
;/*                                                                        */ 
;/*  INPUT                                                                 */ 
;/*                                                                        */ 
;/*    None                                                                */ 
;/*                                                                        */ 
;/*  OUTPUT                                                                */ 
;/*                                                                        */ 
;/*    None                                                                */ 
;/*                                                                        */ 
;/*  CALLS                                                                 */ 
;/*                                                                        */ 
;/*    SVC 1                                 Enter kernel mode             */ 
;/*    SVC 2                                 Exit kernel mode              */ 
;/*                                                                        */ 
;/*  CALLED BY                                                             */ 
;/*                                                                        */ 
;/*    Modules in user mode                                                */ 
;/*                                                                        */ 
;/*  RELEASE HISTORY                                                       */ 
;/*                                                                        */ 
;/*    DATE              NAME                      DESCRIPTION             */
;/*                                                                        */
;/*  09-30-2020     Scott Larson             Initial Version 6.1           */
;/*                                                                        */
;/**************************************************************************/;
;VOID   _txm_module_manager_user_mode_entry(VOID)
;{
    EXPORT  _txm_module_manager_user_mode_entry
_txm_module_manager_user_mode_entry
    SVC     1                                       ; Enter kernel
    EXPORT  _txm_module_priv
_txm_module_priv
    ; At this point, we are out of user mode. The original LR has been saved in the
    ; thread control block. Simply call the kernel dispatch function.
    BL      _txm_module_manager_kernel_dispatch

    ; Pickup the original LR value while still in privileged mode
    LDR     r2, =_tx_thread_current_ptr             ; Build current thread pointer address
    LDR     r3, [r2]                                ; Pickup current thread pointer
    LDR     lr, [r3, #0xA0]                         ; Pickup saved LR from original call

    SVC     2                                       ; Exit kernel and return to user mode
    EXPORT  _txm_module_user_mode_exit
_txm_module_user_mode_exit
    BX      lr                                      ; Return to the caller
;}
    ALIGN 32
    END
